Device for operating car-brakes



(No Model.)

' R. A. KISKADDEN. DEVICE FOR OPERATING GAR BRAKES.

No. 404,418. Patented Jiine 4 1889..

v .x N w shingum. D. C.

projecting above the floor of the car.

NITED STATES ATENT FFICE.

DEVICE FOR OPERATING CAR-BRAKES.

SPECIFICATION forming part of Letters Patent No. 404,418, dated June 4, 1889. Application filed July 9, 1888. Serial No. 279,456. (No model.)

To all whom it may concern:

Be it known that I, ROBERT A. KISKADDEN, a citizen of the United States, residing at Allegheny, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Devices for Operating Car-l3rakes; and I do hereby declare the followingto be a full, clear, and'exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings,

which form a part of this specification.

My invention relates to a device for operating railway and other car brakes; and it consists of the novel construction and combination of parts, as will be fully set forth hereinafter. v

In the accompanying drawings, Figure 1 is a sectional plan View of my improved device for operating car-brakes constructed in accordance with my invention. Fig. 2 is a side elevation of the same. Fig. 3 is a detail sectional View.

To put my invention into practice, I provide a cylinder A of suitable size and form of construction, and secure the same rigidly beneath the floor I) of a railway or other car. Neatly fitted in this cylinder A are two pistons 0, each having securely attached thereto a pistonrod D, which is connected with a lever c, adapted to operate the brake (not shown) of an ordinary car. At each side of this cylinder A, and integral therewith, are two smaller cylinders f, each having a port or opening 9 communicating with the interior of the large cylinder A. Operating in each of these small cylinders f is a valved piston h, similar to those in use in an ordinary airpnmp. Connected to each of these valved pistons 7L is a rod 6, extending separately to each end of the car I), at which point they are attached to a vertically-pivoted hand-lever 7;, At a suitable point on one of the small cylinders f is placed a relief-valve Z, which can be operated by means of a wire cord m and small foot-lever 0 from either end of the car. This valve Z serves to relieve the vacuum, and

cylinder f and pumps the air from between the two pistons 0, thereby forming a vacuum. The pressure of the atmosphere on the other side of the pistons c forces the same toward the center of the cylinder A, thereby moving the brake-levers c and setting the brakes.

When it is desired to release the brakes, the small lever 0 is moved torward,which operates the relief-valve Z, thereby admitting air to the cylinder A, whichinstantaneously relieves the brakes. a

I am aware that it is not new to provide the cylinder of an automatic air-brake with a movable inlet-valve, a discharge-valve connected to and movable with said inlet-valve, a bell-crank lever connected to said valves and having a rod or cord which is connected to a treadle or lever at one end of a car, and a spring connected to said bell-crank lever for normally closing the inlet and opening the discharge valves, whereby the bell-crank lever can be rocked by a pull 011 the cord or rod to open the inlet-valve and admit compressed air to the cylinder; but such is not my invention.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

In a device for manually operating earbrakes, the combination, with a main cylinder and two pistons arranged in opposite ends thereof, of two supplementary cylinders f f, arranged on opposite sides of said main cylinder and each communicating at one end with said main cylinder at a point between the two pistons therein, and having a checkvalve 7', a valved piston 7L, operating in each of the supplementary cylinders and connected with a hand-lever at the end of a car, a reliefvalve l, communicating with said main cylinder at a point between the pistons thereof and having an axially-turning body, and a tremlle I), connected with said relief-valve by hereunto alfix my signature this 24th (lay off an intern'iediate e0nneeti 1m m, whereby air April, A. 'D. 1888. mayheadmittedtethebi'alceeylinderthrough R(-)BFRT A II S] the relief-valve and operate the pistons in lhe main cylinder 10 release the hr.lke-sheeS, In presence 0'l?-- substantially aszuul for thepnrpese described. JAMES ll. PQR'ITE, In iesi'imeny that I claim the foregoing I M. E. HARRISON. 

